If the other boronate ester is used to synthesize the biaryl compound, what would be the appropriate bromo compound. Draw a molecule on the canvas by choosing buttons from the Tools (for bonds and charges), Atoms, and Templates toolbars, including charges where needed. י H EXP CONT ? H C N
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- 51. Which is NOT a valid resonance structure for the conjugate base of this molecule? (A) (C) S (A) OEt O :O: : OEt HBr ROOR OCH 3 (B) 52. What is the major product of this reaction sequence? O PPh3 (D) 11 Mg ether (B) de OEt :0 aom Сосно LOCH 3 53. Which reagent is necessary for this transformation? (D) H OEt H OEt CH31 PPh3 ACS 56.I need help with the step 5 and 6 pleasePQ-20. This type of reaction, typical of carboxylic acids, esters, acid halides, anhydrides and amines, is called: (A) a bimolecular nucleophilic substitution. (C) an electrophilic substitution. (A) (A) H3C-C-OCH₂CH3 OH R CI PQ-21 What would be hydrolyzed most slowly with aqueous NaOH? lo (B) OH₂ (C) H3C-C-OCH₂CH3 H3C-C- H CI + H₂O (B) a nucleophilic addition. (D) a nucleophilic acyl substitution. (C) PQ-22. Which structure is a reasonable intermediate in the acid-catalyzed hydrolysis of ethyl acetate, shown, in dilute aqueous acid? RiOH OH (D) H3C- (D) OH (B) H3C-C-OCH₂CH3 OH₂ + HCI si in
- Which of the following structures and IUPAC names are incorrectly matched? * oe (A) Methyleyclohexanoate (В) `NH2 Br 4-Bromo-3-chlorohexanamide 2-Ethoxypentane (D) HOOC HOOC 3,5-Nonanedioic acid В A DThe question is: "Draw the curved arrow mechanism for the reaction between pentan-2-one and (CH3)3O– in t-butanol to form an enolate. Draw all electrons and charges on both resonance structures. Then answer the question about the reaction." I got the initial arrows correct, but am not entirely sure what the carbanion intermediate would look like and then what the curved arrows would be to convert it to its final oxanion form(b) The activating and deactivating groups could affect the position(s) of the next incoming group(s) to the benzene ring. Based on the structure below, analyze and explain the group(s) on the benzene ring is activating or deactivating group. Then, identify the product(s) formed from the following reactions. NH, CC, CH;CH,COCI AICI, (i) NH, HNO, H,SO, (ii) H Br AICI, (iii) Page 3 of 4
- Rank the following esters from most reactive to least reactive in the first slow step of a nucleophilic acyl substitution reaction (formation of the tetrahedral intermediate): Rank the same esters from most reactive to least reactive in the second slow step of a nucleophilic acyl substitution reaction (collapse of the tetrahedral intermediate).Need help solving this, please show your work with the answer!Complete the mechanism for the hydrolysis below by adding any missing bonds, charges, nonbonding electrons, and curved arrows.